Add 11ty website deployment workflow

.github/workflows/website-deploy.yml

@@ -0,0 +1,55 @@
+name: Build and Deploy Website
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - website/**
+      - github_docs/**
+      - .github/workflows/website-deploy.yml
+  workflow_dispatch:
+
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
+concurrency:
+  group: website-deploy
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  build-and-deploy:
+    name: Build and Deploy 11ty Website
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.7
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+          cache: npm
+          cache-dependency-path: website/package-lock.json
+
+      - name: Install dependencies
+        working-directory: website
+        run: npm ci
+
+      - name: Build website
+        working-directory: website
+        run: npm run build
+
+      - name: Deploy via rsync
+        uses: easingthemes/ssh-deploy@v5.1.0
+        with:
+          SSH_PRIVATE_KEY: ${{ secrets.KST4CONTEST_DEPLOY_KEY }}
+          REMOTE_HOST: ${{ secrets.KST4CONTEST_DEPLOY_HOST }}
+          REMOTE_USER: ${{ secrets.KST4CONTEST_DEPLOY_USER }}
+          SOURCE: website/_site/
+          TARGET: ${{ secrets.KST4CONTEST_DEPLOY_PATH }}
+          ARGS: "-rlgoDzvc --delete"